Suppose you have a lemonade stand, and when you charge $1 per cup of lemonade you sell 60 cups. But when you raise your price to $1.50 you only sell 30 cups. Write an equation for the number of cups you sell as a function of the price you charge. Denote "C" for number of cups, and "P" for the price you charge. Assume the function is linear.

Your line will have negative slope because as the price raises the number sold goes down.

Let P=price per cup and let C=number sold

So, we have (1,60) and (1.5,30)

Use these two coordinates to find the line equation.

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Originally Posted by galactus

Your line will have negative slope because as the price raises the number sold goes down.

Let P=price per cup and let C=number sold

So, we have (1,60) and (1.5,30)

Use these two coordinates to find the line equation.

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Thanks a lot